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So I have been trying to make a controller cable for a racka golf cart with a fj 350a controller. I have a USB to 5v TTL UART Serial Cable and an automotive 4 pin connector. The fj controller uses 3 wires. No mater what I do I cannont get it to connect to the evolution software. I think I fundamentally do not understand what I need from my hardware connections. I have been told its a 19200 baud rate so that eliminated 1 variable. since it is 3 wire I assumed TX RX and GND. But I have been reading there is a handshake protocol so I also tried plugging the cts to gnd because I saw somewhere that some other serial controller worked that way. Still get nothing. So I believe I'm just not getting the right wires to the right pins. Anyone have any thoughts on which wires of Tx, RX, GND, CTS, RTS, and VCC I need. Im assuming I dont need VCC since the evolution software wont work unless the golf cart is on. I assume the controller is getting any power it needs from the battery during programming. I asked this question on buggies gone wild too but for some reason I cant get on that site tonight.
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you might need a legit ftdi chip usb to 5v ttl uart serial cable cause you probably gotta mess with the ftdi chip settings a bit. if its anything like the curtis connections you can try connecting black gnd to pin 2, txd (orange) to pin 1, and rxd yellow to pin 3. just leave pin 4 blank. that’s just a guess tho so like don’t come at me if it doesn’t work lol -
It's a legit ftdi. I tried txd, rxd, and ground in all 3 positions and got no connection.
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Most RS232 devices typically use no parity, 8 data bits, and 1 stop bit (commonly referred to as N81), which is the standard configuration for most serial communications. In terms of baud rates, you'll often encounter speeds like 9600, 19200, 38400, or 115200, with the occasional lower rate like 1200 for legacy devices or specific applications. I think for the EVolution controller cable uses baud rate of 19200 in your FTDI FT Prog settings.Comment
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